From 9efacd8a8b34863b649d96a6842f027723ea5522 Mon Sep 17 00:00:00 2001
From: Stefan Frederik <stefan.schippers@gmail.com>
Date: Wed, 7 Sep 2022 09:31:09 +0200
Subject: [PATCH] Revert r2272; zoom by area plots reverse x axis if done with
 Shift key pressed

---
 src/callback.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/callback.c b/src/callback.c
index efacc74c..3a763c1e 100644
--- a/src/callback.c
+++ b/src/callback.c
@@ -343,7 +343,12 @@ static int waves_callback(int event, int mx, int my, KeySym key, int button, int
     /* parameters for zoom area by mouse drag */
     xx1 = G_X(xctx->mx_double_save);
     xx2 = G_X(xctx->mousex_snap);
-    /* if(xx2 < xx1) { double tmp; tmp = xx1; xx1 = xx2; xx2 = tmp; } */
+    if(state & ShiftMask) {
+      if(xx1 < xx2) { double tmp; tmp = xx1; xx1 = xx2; xx2 = tmp; }
+    } else {
+      if(xx2 < xx1) { double tmp; tmp = xx1; xx1 = xx2; xx2 = tmp; }
+    }
+
     if(xx1 == xx2) xx2 += 1e-6;
   }